Buggy code:
public class CommandlineJava implements Cloneable { private Commandline vmCommand = new Commandline ( ) ; private Commandline javaCommand = new Commandline ( ) ; private CommandlineJava . SysProperties sysProperties = new CommandlineJava . SysProperties ( ) ; private Path classpath = null ; private Path bootclasspath = null ; private String vmVersion ; private String maxMemory = null ; private Assertions assertions = null ; private boolean executeJar = false ; private boolean cloneVm = false ; public static class SysProperties extends Environment implements Cloneable { Properties sys = null ; private Vector propertySets = new Vector ( ) ; public String [ ] getVariables ( ) throws BuildException { } public void addDefinitionsToList ( ListIterator listIt ) { } public int size ( ) { } public void setSystem ( ) throws BuildException { } public void restoreSystem ( ) throws BuildException { } public Object clone ( ) { } public void addSyspropertyset ( PropertySet ps ) { } private Properties mergePropertySets ( ) { } } public CommandlineJava ( ) { } public Argument createArgument ( ) { } public Argument createVmArgument ( ) { } public void addSysproperty ( Environment . Variable sysp ) { } public void addSyspropertyset ( PropertySet sysp ) { } public void setVm ( String vm ) { } public void setVmversion ( String value ) { } public void setCloneVm ( boolean cloneVm ) { } public Assertions getAssertions ( ) { } public void setAssertions ( Assertions assertions ) { } public void setJar ( String jarpathname ) { } public String getJar ( ) { } public void setClassname ( String classname ) { } public String getClassname ( ) { } public Path createClasspath ( Project p ) { } public Path createBootclasspath ( Project p ) { } public String getVmversion ( ) { } public String [ ] getCommandline ( ) { } private void addCommandsToList ( final ListIterator listIterator ) { getActualVMCommand ( ) . addCommandToList ( listIterator ) ; sysProperties . addDefinitionsToList ( listIterator ) ; if ( isCloneVm ( ) ) { CommandlineJava . SysProperties clonedSysProperties = new CommandlineJava . SysProperties ( ) ; PropertySet ps = new PropertySet ( ) ; PropertySet . BuiltinPropertySetName sys = new PropertySet . BuiltinPropertySetName ( ) ; sys . setValue ( "system" ) ; ps . appendBuiltin ( sys ) ; clonedSysProperties . addSyspropertyset ( ps ) ; clonedSysProperties . addDefinitionsToList ( listIterator ) ; } if ( haveBootclasspath ( true ) ) { listIterator . add ( ( "-Xbootclasspath:" + ( bootclasspath . toString ( ) ) ) ) ; } else if ( cloneBootclasspath ( ) ) { listIterator . add ( ( "-Xbootclasspath:" + ( systemBootClasspath . toString ( ) ) ) ) ; } if ( haveClasspath ( ) ) { listIterator . add ( "-classpath" ) ; listIterator . add ( classpath . concatSystemClasspath ( "ignore" ) . toString ( ) ) ; } if ( ( getAssertions ( ) ) != null ) { <START_BUG> getAssertions ( ) . applyAssertions ( this ) ; <END_BUG> } if ( executeJar ) { listIterator . add ( "-jar" ) ; } javaCommand . addCommandToList ( listIterator ) ; } public void setMaxmemory ( String max ) { } public String toString ( ) { } public String describeCommand ( ) { } public String describeJavaCommand ( ) { } protected Commandline getActualVMCommand ( ) { } public int size ( ) { } public Commandline getJavaCommand ( ) { } public Commandline getVmCommand ( ) { } public Path getClasspath ( ) { } public Path getBootclasspath ( ) { } public void setSystemProperties ( ) throws BuildException { } public void restoreSystemProperties ( ) throws BuildException { } public CommandlineJava . SysProperties getSystemProperties ( ) { } public Object clone ( ) { } public void clearJavaArgs ( ) { } protected boolean haveClasspath ( ) { } protected boolean haveBootclasspath ( boolean log ) { } private boolean cloneBootclasspath ( ) { } private boolean isCloneVm ( ) { } }

Fix:
getAssertions ( ) . applyAssertions ( listIterator ) ;